Shutter opening and closing mechanism for an electrographic appa

Details Shutter opening and closing mechanism for an electrographic appa Shutter opening and closing mechanism for an electrographic appa

1977-08-18

1979-04-10

Braun, Fred L.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 3R, G03B 2776

Patent

active

041485815

ABSTRACT:
A shutter opening and closing mechanism for an electrographic apparatus comprising a dark box for surrounding a photosensitive screen and provided with an opening through which light flux reflected from a manuscript image is projected onto the photosensitive screen. The opening is closed by a shutter operatively interlocked with a reciprocating exposing and scanning mechanism and becomes open only when a first electrostatic latent image corresponding to the manuscript image is to be produced on the photosensitive screen.

REFERENCES:
patent: 3724942 (1973-04-01), Gibson et al.
patent: 3918971 (1975-11-01), Zweig
patent: 4008954 (1977-02-01), Ogawa et al.

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